Internal-combustion engine



Dec', 30, 19.24.. 1,521,220.

.E. H. FRIEND ET AL INTRNAL coMBusTroN ENGINE Filed April 12, 1924 /IIfPatented Bec. 30, 1924,

inn s l itt El tl EDWARD HENRY EEiENn, or xaTooMEn, NEW soUTn wenns, ANDALBERT GILEAD BENTLEY, or MELBoUENE, VICTORIA, .nusTnnLri-i, Assi-encresTo THE FRIEND BENTLEY ELEMENTS coiurANY LIMITED. or isrELnojoza-NE,AUsTRALTA.

INTERNAL-COMBUSTEON ENGINE.

Application filed April 12, 1324. Serial No. 7065202.

To all whom t may concern.' v

Be it known that we, Enwiinn HENRY FRIEND and ALBERT GILEAD BENTLEY,both subjects of the liling` et Great Britainl residing, respectively,at liatcomba, nlew South l/Vales, Australia, and Reddam House, 409Lonsdale Street, Melbourne, Victoria, Australia, have invented certainnew and useiul improvements in or Relating to lnternal-CombustiouEngines, o1' which the following is a specilication.

This invention relates to internal conibus tion engines of the type inwhich theworin ing piston operates in conjunction withan abutment offixed piston type extending into a sleeve on the working piston.

@ne objectief the invention is to provide u simplied and more efficientconstruction ot' engine in which the working stroke exerts pullingaction on the connecting' rod so as to eliminate bending stresses.Another object is to improve the cooling ot' the abutment and theworking piston. A. further object is to facilitate the ritt-ing of theabutment, piston and connecting rod and the assembling of the parts, Astill -further object is to improve the supply ot the charge and theexhaust oit the products ot combustion.

The accompanying drawings illustrate one embodiment of the inventionFigures l and 2 are, respectively, a vertical section and an invertedsectional plan ot the said embodiment.

A is the engine cylinder. B the moving piston with sleeve t upon or intothe upper end of which the flange of the piston is screwed. C is thefixed abutment or stationar,7 piston carried by the limbs or supports cbolted at c1 to the cylinder through spacing; members' C* near the lowerend. D is the connecting rod.

The piston or piston head B is screwed into the outer end of the pistonsleeve o through the flange b1 provided with piston rings o2. At thelower end of the piston sleeve are the exhaust ports 5S adapted at theend of the outer piston stroke to regis` ter with the exhaust channel c1of the cylnder. 1l `or lubrication a lubricating oil pipe G is shown asiitted at the top of the cylinder so that the oil can drop upon theouter face of the piston.

A pump compression space H is provided between the piston head and thetop ot' vthe interior of the pistou, so that the charge compressed inthe pump space l-l is more than suiiicient to fill the working space atthe end ot' the working stroke when the products of combustion escapethrough the exhaust ports o8 and the compressed charge trom the pumpspace H enters through the ports 2,, driving' the products of combustionin front ot' it. The grudgeon pin ci, to which the upper end ot theconnecting` rod (Z is attached7 is carried by a pair of bearing`brackets o5 integral with the piston extensions o which projectdownwardly on each side between the limbs c ot the abutment. Between thelimbs (the outer faces of which are concentric with the cylinder) andthe cylinder wall an annular space is left within which slides thepiston sleeve o. The gudgeon pin d extends diametrically between the twolimbs c.

The inlet channel itl leads from a carburetter and supplies theexplosive mixture to the pumpspace H in the head ol' the cylinder. Thecylinder inlet ports (1,2 are placed immediately above the abutment C1at one side and the exhaust al is at the opposite side, the piston beingprovided with inlet and exhaust ports 712 228 at the opposite sides ofthe sleeve. The charge is admitted to the working space through theinlet channel 7a2 leading from the pump space l-l along the side of thecylinder and the abutment is provided with a deflector c3 to direct ltheiniiowinp; gases upwardly to drive the prod ucts of combustion outthrough the exhaust ports. i

The abutment C1 is shown with a water cooling space c4 and the coolingwater is admitted and discharged through the channels @5in the limbs c.

What we claim and desire to secure by Letters Patent of the UnitedStates is tl. In .an internal combustion engine, a

'eylinden a sleeved reciprocating piston in f the said eylindei, ahollow abutment of fixed piston type extending into the piston sleeve',limbs earryingtl're said abutment and extending towards the lower end ofthe cylinder, which limbs are provided with watei` channels for supplyof Cooling water to the bollo-w alnitment7 Spacing members between thesaid limbs at their loweil end and tbe cylinder and means for boltingtbe Said eylifnder, whereby the limbs provide a cleal space between themand tbe inner surface o the cylinder for the imssagge of the pistonsleeve. v f

2. ln an intern-al1 coniibnstion engine, a cyl-indem a sleevedreciprocating pist-Ion in the said cylinder, an abutment of xed pistontype extending into the piston sleeve, li'mibs @ari-ying the. Saielabutment, and extending towards the lower end of the cylinder, a spacefor `tlne piston sleeve being; left between the' limbs and the cylinder,a connecting` rod, a niclgeon' pin lying between tbe abutment limbs anda pair of brackets. pirofi-eeting inwardly from the pis' ton sleevebetween the. two abutment limbs to' enmity the said gndgeon pin.

3. ln an internal combustion engine as in claim L a connecting' reel. aglnelgigeonpin and integrali bearing* blfaekets for the gudgeon pine thepiston sleeve, which bitadiets extend unfdfe' the lined water coolednlnet ment.

EDWARD HENRY FRlEEND.. illbllll'l?L GIlbEi-MD BENTL"EY.

